I miss this guy very much and I don't know what to do.?

I told him that I like him yesterday, he took it very well I thought he was going o be mean about it or something, but the reason I told him was because he left this morning to mexico and might not come back. I miss him so much, I feel empty inside, I know that to him I am nothing, but to me he is everything. I cant text him because his phone won't work over there, what do I do?